Terahertz pulse generation from quantum cascade lasers

Wang, F, Maussang, K, Moumdji, S et al. (9 more authors) (2015) Terahertz pulse generation from quantum cascade lasers. In: 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). International Conference on Intersubband Transitions in Quantum Wells (ITQW), 06-11 Sep 2015, Vienna, Austria. IEEE . ISBN 978-1-4799-8272-1

Abstract

We demonstrate the generation of 11ps terahertz pulses from metal-metal (MM) quantum cascade lasers (QCLs) at 77K via active mode-locking. Contrary to popular belief that a long gain recovery time is required, we demonstrate that the dominant factor necessary for active pulse generation is in fact the synchronization between the propagating electronic microwave modulation and the generated THz pulses in the QCL. This allows the THz pulse to propagate in phase with the microwave modulation along the gain medium, permitting pulse generation.

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Authors/Creators:	Wang, F Maussang, K Moumdji, S Colombelli, R Freeman, JR https://orcid.org/0000-0002-5493-6352 Kundu, I https://orcid.org/0000-0002-3564-1903 Li, LH Linfield, EH Davies, AG https://orcid.org/0000-0002-1987-4846 Mangeney, J Tignon, J Dhillon, SS
Copyright, Publisher and Additional Information:	© 2015, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords:	Quantum cascade lasers; Pulse generation; Microwave propagation; Electric fields; Masers; Phase modulation
Dates:	Accepted: 15 July 2015 Published: 12 November 2015
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	24 Sep 2015 11:10
Last Modified:	12 Apr 2017 08:21
Published Version:	http://dx.doi.org/10.1109/IRMMW-THz.2015.7327685
Status:	Published
Publisher:	IEEE
Identification Number:	https://doi.org/10.1109/IRMMW-THz.2015.7327685

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Terahertz pulse generation from quantum cascade lasers

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